Window-lifting apparatus



E. G. SIMPSON, C. l. SCHMIDT AND F. P. CARSTENS.

WINDOW LlFTING APPARATUS.

ArPucAnoN men oc. l. 1919.

gvf////////////ml||||||i'//////////// /f j Patented June 15,1920;

P. CARsTnNs,

EMoHY GLENN sIMPsoN,

or DETROIT, MICHIGAN, or DETROIT, MICHIGAN,

WINDOW-1.1mm@ ArrAHATnsf CHARLES JOHN SCHIIIDT, AND FRANK PHILIP.CARSTENS, ASSIGNORS T0 TEBNSTEDT MANUFACTURING COMPANY, A CORPORATION0F MICHIGAN.

Application filed October 1, 1919'. No.5327',660.

To all whom it may concern: Be it known that we, SIMPSON, CHARLES J.SCHMnrr, and FRANK residing at Detroit, in the county'of Wayne and Stateof Michigan, have invented certain new and useful Improvements inWindow-Lifting Apparatus, of which the following is a specification.

This invention' relates to stops. It is necessary in mobile body to(provide some form of stop which willvhol position at any point valongits range of travel. rlhis is usually accomplished by. providing alocking device which is disengaged. by the initial turning effort of thecrank before the turnin effort of the crank takes eiiect upon the li ingmechanism.

It is the object of the present invention to provide a window lifterstop of quite a different type wherein no lost motion between the crankand lifting mechanism is-required to release the lock.' Thedeviceoperates simply on, the principle drive. The parts are of suchdesign that practically all ofthem can be madesimply as stampings, whichvery materially reduces the cost of manufacture.

In the drawings, Figure 1 is an inside elevation of the top parts.- ofan crdinary window lifter.

isf'a section on the line 2-2 of Fig. 1. l Fig. 3 is a detail-of thestop or the irreversible driving connection'shown in nonactive position.

" Fig. 4 is a similar view showing how the.

irreversible driving connection locks when turning eiort is' exerted bythe tendency of' the window to drop.

Fig. 5 is a similar view showing'how the irreversible driving connectionallows the parts to rotate when the turning eiiort is exerted 'throughthe crank.

Fig. 6 is a section on the line 6--6 of Fig. 3.

Fig. shaft.

Fig. 8 is a lperspetivc detail of the drivindisk.

ig. 9 is an elevatlon 7 is a perspective detail ofthe crank;

EMORY GLENN citizens of the United States,

window lifter connection with.v the ordinary window lifter in a` closedautothe window in its lifted*- Alifting mechanism.

of an irreversible the bottoms of their box 7c, but there is nothing tocarrythe'other of the. spring Specication of Letters Patent. PatntedJune 15,1920, I

The ordinary chain window-lift comprisesP a chain a running over asprocket wheel b, which is driven by a large gear that in turn is drivenby av small pinion d. It has, heretofore,`ordinarily been the prac-'tice to' provide a lock between this pinion d and. a stationary part ofthe4 casing e.

little lost motion is provided between the crank and the driving pinionso'that the initial movement of the crank in taking up this lost motionserves by' a cam actionto release the pinion from its lockingengagewheel C l ment with the stationary part ofthe casing.

y The present window-litter stop operates on the principle-.of anirreversible ldriving connection between the crank and window Thecrankshaft is desiatted at one end as at g to' take the crank (notshown). The casing h is on its ront faceperforated as at 'i to receivethe'fingers j of the window-lifterstop box k. This serves to clamp thewindow-lifter-stop box to the casing that houses the driving parts ofthe window-lift.

ignated f and is This window-liter-stop box is detailed secv tionally inFig. 6. A Living plate Z ofthe peculiar shape shown in Figs. 3,4 and 5,is roughly of a double hour-glass shape, and is provided with fourrecesses fm, for the disks When the disks lnl are in repose, as shown inFig. 3, at the bottom of the recesses m, there is a clearance betweenthe the boxc. However, when an e'ort is made to turn the driving plate lby applying the turning eiort' directly to the plate, the jammed g Theoutline of the driving plate leading away from the bottom of the recessm is radially a slightly greater distance from the.

Hence l center than lthe bottom. of the recess. when the weight of thevwindow tends to drive the pinion d, this pinionv being in drivingconnection with the 4driving' plate Vthrough'the pins p,

Fig. 4 occurs. The disks niwhich -areon disks' and condition shown inFig. 4 results.

the result portrayed in the forward side lof the driving plate l(conlsidering'that side forward which is forwar in the direction of turning)drop back in to recesses andclear the two disks "fn, that lie at therear of the driv- -ing plate around with the driving plate. The inclined'surfaces o leadingv out ofthe I recesses 'im' Wedge lin 'under the balland and the box` because they to engage betweenthe plate. If the turningeffort is communicated l thereby -jam them between the box and thedriving plate. An effort to move the driving plate through the pinion inthe opposite direction results in exactly the same jamming action exceptthat the other two i balls takepart in the jamming instead of thosementioned.

When turning effort is communicated to the plate by the crankshafta'different action takes plaee.' The crankshaft is provided with aflange or driving keyl g, which engages ina similar hole inthe drivingdisk r. This driving disk is provided with a pair of struck-down lugs sthat are adapted disks n of the driving to the crank, these driving lugs.s drive the drivingplate Z through' the rear disks n, as` shown in Fig.5. The forward disks are Anever -in danger of jamming in between' thedriving plate and the box c. The rear disks cannot jam in between thedriving plate are carried along ahead of' the driving lugs s. Theyconsequence is that all the disksv now clear the i box and there is nojamming or locking action whatever. The saine action takes place whenthe driving is done in the opposite direction. Y V j t-is a spring diskinterposed between the driving disk r and the driving plate Z for thepurpose of taking up any side play and making the device rattle-proof. uis a counter-balancin spring housedA between the gear c and t e casin atwe claim is: 1. In a window lift, the combination of means for lifting awindow including av pinion, and an irreversible driving connectiontherefor which turns freely when actuated to turn the pinion but whichlocks when the pinion is turned to actuate the driving ber byconnection, said irreversible driving connection comprising acylindrical box, an actuating member connected with the pinion andprovided with-recesses, rolling members engaging in said recesses, asecond actuating member connected with a crankshaft and which canactuatethe first actuating memengaging the said rolling members, said recessesbeing so formed that anattempt to turn the first actuating memberthrough the gear will vthrust relation with the allows free the rollingreversible driving connection, the parts of said irreversible drivingconnection thrust-` in g radially outward and jamming when actuation isattempted through the pinion While the parts operate freely withclearance when actuation is through the crank-` .l

shaft. f

3. In a window lift, the combination of,

means for lifting a window including a pinion, a cylindrical boxsupported adjacent thereto, box, a' disk 9 provided with lugs and whichis-coupled up in driving relation with the .70 a crankshaft runningthrough the crankshaft, a driving' plate Z that is coupled with the saidpinion'to drive therewith, the said driving plate and driving disk beinglocated in said ybox and the driving plate being provided with recesses,'and rolling members adapted to engage in said recesses which arearranged to provide cam surfaces to thrust the rolling members intojammed cylindrical box when actuation is from the driving plate butwhich said rolling members remain ,in their recesses and allow thedriving plate to rotate freely when actuation ing disk?.

' 4. In awindow lift, the combination of means for raisin and lowering awindow including a rotating member and a crank,

is through the drivand a clutch for holding the window at any itstravel, comprising a the parts in radially retracted position androtation .o raise and vlower the Window. l

,In testimony whereof we al'Hx our signatures.

EMORY GLENN SIMPSON. CHARLES JOHN SCHMIDT. FRANK PHILIP CARSTENS.

